Python Check Armstrong Number

by Online Tutorials Library July 22, 2022

Python Program to check Armstrong Number

Suppose we have a given number, “K”, and we have to check whether the given number is an Armstrong number or not. In this tutorial, we will learn how to identify the given number is an Armstrong number or not using Python.

Definition:

A positive number of “p” number of digits is called an Armstrong number of order n (order is the number of digits) if:

Example:

  Input:  407  Output: Yes, 407 is an Armstrong number  Solution:  (4 * 4 * 4) + (0 * 0 * 0) + (7 * 7 * 7) = 407   Input:  1634  Output: Yes, 1634 is an Armstrong number  Solution:  (1 * 1 * 1) + (6 * 6 * 6) + (3 * 3 * 3) + (4* 4 * 4) = 1634  Input:  253  Output: No, 253 is not an Armstrong number  Solution:  (2 * 2 * 2) + (5 * 5 * 5) + (3 * 3 * 3) = 160  Input:  1  Output: Yes, 1 is an Armstrong number  Solution:  (1* 1) = 1  

Example:

  def power_1(A, B):              if B == 0:          return 1      if B % 2 == 0:          return power_1(A, B // 2) * power(A, B // 2)                  return A * power(A, B // 2) * power(A, B // 2)      # Function for calculating “order of the number”  def order_1(A):          # Variable for storing the number      N = 0      while (A != 0):          N = N + 1          A = A // 10                  return N      # Function for checking if the given number is Armstrong number or not  def is_Armstrong(A):              N = order_1(A)      temp_1 = A      sum_1 = 0              while (temp_1 != 0):          R_1 = temp_1 % 10          sum_1 = sum_1 + power_1(R_1, N)          temp_1 = temp_1 // 10          # If the above condition is satisfied, it will return the result      return (sum_1 == A)      # Driver code  A = int(input(“Please enter the number to be checked: “))  print(is_Armstrong(A))  

Output:

1#  Please enter the number to be checked:  0  True  2#  Please enter the number to be checked:  123  False  3#  Please enter the number to be checked:  1634  True

Conclusion

In this tutorial, we discussed how to verify whether the given number is an Armstrong number or not.

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